137422643 has 4 divisors (see below), whose sum is σ = 137520240. Its totient is φ = 137325048.

The previous prime is 137422639. The next prime is 137422651. The reversal of 137422643 is 346224731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346224731 = 821 ⋅421711.

It is a cyclic number.

It is not a de Polignac number, because 137422643 - 2² = 137422639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137422613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46655 + ... + 49512.

It is an arithmetic number, because the mean of its divisors is an integer number (34380060).

Almost surely, 2^137422643 is an apocalyptic number.

137422643 is a deficient number, since it is larger than the sum of its proper divisors (97597).

137422643 is an equidigital number, since it uses as much as digits as its factorization.

137422643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97596.

The product of its digits is 24192, while the sum is 32.

The square root of 137422643 is about 11722.7404219321. The cubic root of 137422643 is about 516.0432467309.

The spelling of 137422643 in words is "one hundred thirty-seven million, four hundred twenty-two thousand, six hundred forty-three".